#2B2E57
Closest named color: Prussian Blue (#1D3557). oklch(32% 0.072 278.3), rgb(43, 46, 87).
Aa
White text reads best on this color (12.87:1).
About this color
#2B2E57 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.072 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 12.87:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.63:1 |
| White text | 12.87:1 |
Values
| HEX | #2B2E57 |
| RGB | rgb(43, 46, 87) |
| HSL | hsl(236, 34%, 25%) |
| OKLCH | oklch(32% 0.072 278.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #2B2E57 | 12.87:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #2B2E57 | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #2B2E57 text on white | 12.87:1 | AAA | Lc 98.9 | Preferred for body text |
| #2B2E57 text on black | 1.63:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9FB
oklch(93.7% 0.024 278.4)
-
Step 200
200
#D1D7F9
oklch(88.5% 0.047 277.5)
-
Step 300
300
#B3BCF8
oklch(80.9% 0.085 277.7)
-
Step 400
400
#8E96F4
oklch(70.6% 0.137 278.6)
-
Step 500
500
#7479F0
oklch(63% 0.175 278.3)
-
Step 600
600
#5F5FDF
oklch(55.7% 0.19 278.3)
-
Step 700
700
#4F4DC1
oklch(49.1% 0.176 278.4)
-
Step 800
800
#40409C
oklch(42.6% 0.146 278.2)
-
Step 900
900
#36377C
oklch(37.6% 0.114 278.7)
-
Step 950
950 (this color)
#2B2E57
oklch(32% 0.072 278.3)
#2B2E57 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #1E3359 | 0.022 |
| Deuteranopia (no green cones) | #1B3056 | 0.023 |
| Tritanopia (no blue cones) | #1B373E | 0.064 |
| Achromatopsia (no color) | #323232 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B2E57
#2B2E57
oklch(32% 0.072 278.3)
- #3C3300
#3C3300
oklch(32.1% 0.066 98.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #2B2E57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Space Cadet #2B2D42 ΔE 0.038
- Marine #042E60 ΔE 0.044
- Gunmetal #293241 ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.051
- Marine Blue #01386A ΔE 0.052
- Midnight Green #073B4C ΔE 0.060
- Oxford Blue #1B263B ΔE 0.061
Use #2B2E57 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.